Aerospace and Defense Product Overview

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Helicopter Main Drive Auto-Rotation Clutch

Formsprag Clutch Sprag Retainer Assemblies are used in the main drive of a single or multi-engine Helicopter to provide auto-rotation capability which helps assure a safe landing in an emergency situation.

Helicopter Twinning Gearbox Clutch

Formsprag Clutch Sprag Retainer Assemblies are used in the driveline Gearboxes of multi-engine Helicopters to allow twinning of the engines for efficient power sharing and synchronization or disengagement of one engine.

Aircraft Auxiliary Power Unit (APU) Starter Clutch

Formsprag Clutch Sprag Retainer Assemblies are used in the Starter drive of APUs to automatically disconnect the Starter after powering up.

Gas Turbine Engine Starter Clutch

Formsprag Clutch Sprag Retainer Assemblies are used in the Starter drive of a Jet Turbine Engine and provide automatic disconnect of the engine upon light-up.

Aircraft Auto-Throttle Control Device

Formsprag Clutch Bi-Directional Dual Input Sprag Clutches are used in the automatic system for throttle control of aircraft jet engines to provide a manual override of the servo systems in the event of an emergency or synchronization of the engines.

Tank Turret Positioning Backstop

Formsprag Clutch Formlock Bi-Directional Clutches are used in the drive and positioning system of tank turret guns and other mobile guns to prevent the barrels from backdriving from preset.